otiose vs idle

otiose is not a noun while idle is a noun.

Word	Noun	Adjective	Verb	Adverb
otiose	No	Yes	No	No
idle	Yes	Yes	Yes	No

otiose (noun)	idle (noun)
	the state of an engine or other mechanism that is idling

otiose (adjective)	idle (adjective)
disinclined to work or exertion	not in action or at work
producing no result or effect	silly or trivial
serving no useful purpose; having no excuse for being	not in active use
	lacking a sense of restraint or responsibility
	not having a job
	not yielding a return
	without a basis in reason or fact

otiose (verb)	idle (verb)
	run disconnected or idle
	be idle; exist in a changeless situation